Which of the following is true about Student\'s t-models? A) All of the above. B

Question

Which of the following is true about Student's t-models? A) All of the above. B) They are unimodal, symmetric, and bell shaped. C) As the degrees of freedom increase, the t-model look more and more like the Normal. D) They have fatter than the Normal model. Find the critical z value(s). Assume that the data has a normal distribution. Draw your Norma to show your work alpha = 0.02; H_1 os P 0.39 Find the margin of error for the 95% confidence interval used to estimate the population proportion. In a clinical test with 2232 subjects, 50% showed improvement from the treatment. Use the given degree of confidence and sample data to construct a confidence interval by hand calculation for the population proportion p. Show your work to get credit. n = 186, x = 104; 95 percent

Explanation / Answer

6) all of the above:

7)

a)for left tailed test ; z value =-2.0538

8)for two tailed test z=-/+1.645

9)for right tailed test z=1.645

10)std error =(p(1-p)/n)1/2 =0.0106

for 95% CI, z=1.96

margin of error =z*std error =0.0207

11)p=140/186=0.75

hence

std error =(p(1-p)/n)1/2 =0.0316

for 95% CI, z=1.96

hence confidence interval =p-/+ z*std error =0.6907 ; 0.8147

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.